SIOUX VALVE SEAT WHITE GRINDING WHEELS SET 24 PCS STONE HOLDER STAR DRIVE 11/16"SIOUX VALVE SEAT WHITE GRINDING WHEELS SET 24 PCS STONE HOLDER STAR DRIVE 11 16" SIOUX VALVE SEAT GRINDER STONE SET OF 24 PCS WITH SIOUX STONE HOLDER 11 16" THREAD STAR DRIVE BALL AND SHAFT. VITRIFIED BOND 80 GRIT MEDIUM. ALUMINIUM OXIDE ZIRCON WHITE STONES 25MM (1") TO 63MM (2. 1 2") STONE SIZES : 2. 1 2" 2 PCS, 2. 1 4" 2 PCS, 2" 2 PCS , 1. 7 8" 2 PCS, 1. 3 4" 2 PCS, 1. 5 8" 2 PCS, 1. 1 2" 2 PCS, 1. 3 8" 2 PCS, 1. 1 4" 2 PCS, 1. 1 8" 2 PCS, 1. 3 16"